Single-Supply Fliege Bessel Low Pass Filter

Problem:
How does a designer make a Fliege Bessel low pass filter that operates from a Single-Supply?

Solution:
Use the circuit below:



This circuit has a fixed gain of 2 (6 dB).

The designer, if not familiar with the topics, may want to review Coupling Capacitors (Cin in the schematic) and Virtual Grounding (Vcc/2 in the schematic).